Results 51 to 60 of about 322,683 (317)

Absolute evaluation of internal and external quantum efficiencies and light extraction efficiency in InGaN single quantum wells by simultaneous photoacoustic and photoluminescence measurements combined with integrating-sphere method

Science and Technology of Advanced Materials: Methods
Separated evaluation of factors in the external quantum efficiency (EQE) is important in order to improve the characteristics of semiconductors optical devices.
Keito Mori-Tamamura, Yuchi Takahashi, Shigeta Sakai, Yuya Morimoto, Junji Hirama, Atsushi A. Yamaguchi, Susumu Kusanagi, Yuya Kanitani, Yoshihiro Kudo, Shigetaka Tomiya   +9 more
doaj   +1 more source

Fast electrochemical doping due to front instability in organic semiconductors

, 2011
The electrochemical doping transformation in organic semiconductor devices is studied in application to light-emitting cells. It is shown that the device performance can be significantly improved by utilizing new fundamental properties of the doping ...
C. K. Law, D. Valiev, G. Brodin, L. Edman, L. D. Landau, M. Marklund, M. Modestov, P. Matyba, V. Akkerman, V. Bychkov, Ya. B. Zeldovich   +10 more
core   +1 more source

Synchrotron Radiation for Quantum Technology

Advanced Functional Materials, EarlyView.
Materials and interfaces underpin quantum technologies, with synchrotron and FEL methods key to understanding and optimizing them. Advances span superconducting and semiconducting qubits, 2D materials, and topological systems, where strain, defects, and interfaces govern performance.
Oliver Rader, Sakura Pascarelli, Klaus Attenkofer, Anna A. Makarova, Karsten Holldack, Kai Rossnagel, Kristiaan Temst, George Kourousias, Stefano Carretta, Caterina Biscari, Helmut Dosch   +10 more
wiley   +1 more source

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

Advanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong, Changfan Xu, Huaping Zhao, Yong Lei   +3 more
wiley   +1 more source

Induced spin texture in semiconductor/topological insulator heterostructures [PDF]

, 2011
We show that a semiconductor thin film can acquire a non-trivial spin texture due to the proximity effect induced by a topological insulator. The effect stems from coupling to the topological surface states and is present even when the insulator is doped.
G. D. Mahan, Jimmy A. Hutasoit, Tudor D. Stanescu   +2 more
core   +3 more sources

Copper‐based Materials for Photo and Electrocatalytic Process: Advancing Renewable Energy and Environmental Applications

Advanced Functional Materials, EarlyView.
Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida, Yanjie Wang, Thais A. Rodrigues, Paulo H. H. Nunes, Vagner R. de Mendonça, Paulo H. E. Falsetti, Leticia V. Savazi, Tao He, Alexandra V. Bardakova, Aida V. Rudakova, Jie Tian, Alexei V. Emeline, Osmando F. Lopes, Antonio Otavio T. Patrocínio, Jia Hong Pan, Caue Ribeiro, Detlef W. Bahnemann   +16 more
wiley   +1 more source

Investigation of $I-V$ Linearity in TaO_x-Based RRAM Devices for Neuromorphic Applications

IEEE Journal of the Electron Devices Society, 2019
We perform experiments and device simulations to investigate the origin of current-voltage (I-V) linearity of TaOX-based resistive switching memory (RRAM) devices for their possible application as electronic synapses. By using electrical characterization
Changhyuck Sung, Andrea Padovani, Bastien Beltrando, Donguk Lee, Myunghoon Kwak, Seokjae Lim, Luca Larcher, Vincenzo Della Marca, Hyunsang Hwang   +8 more
doaj   +1 more source

Two-photon-induced photoconductivity enhancement in semiconductor microcavities: a theoretical investigation [PDF]

, 2002
We describe a detailed theoretical investigation of two-photon absorption photoconductivity in semiconductor microcavities. We show that high enhancement (by a factor of >10, 000) of the nonlinear response can be obtained as a result of the microcavity ...
Barry, Liam P., Bradley, Ann Louise, Donegan, John Francis, Dunbar, L.A., Folliot, H., Hegarty, J., Krug, T., Lynch, Michael   +7 more
core   +1 more source

All‐in‐One Analog AI Hardware: On‐Chip Training and Inference with Conductive‐Metal‐Oxide/HfOx ReRAM Devices

Advanced Functional Materials, EarlyView.
An all‐in‐one analog AI accelerator is presented, enabling on‐chip training, weight retention, and long‐term inference acceleration. It leverages a BEOL‐integrated CMO/HfOx ReRAM array with low‐voltage operation (<1.5 V), multi‐bit capability over 32 states, low programming noise (10 nS), and near‐ideal weight transfer.
Donato Francesco Falcone, Victoria Clerico, Wooseok Choi, Tommaso Stecconi, Folkert Horst, Laura Bégon‐Lours, Matteo Galetta, Antonio La Porta, Nikhil Garg, Fabien Alibart, Bert Jan Offrein, Valeria Bragaglia   +11 more
wiley   +1 more source

Solely Light‐Induced Integrate‐and‐Fire 1T‐Neuron Operation and Implementation of the McGurk Effect

Small Structures
The increase in global data processing demands cannot be addressed with the limited architecture and processing speeds of existing technologies. Therefore, neuromorphic systems designed to emulate the functionalities of the human brain have emerged as a ...
Jaehee Lee, Jung Wook Lim, Chohyeon Park
doaj   +1 more source